General guidelines for the toggle-rates of Ex-OR (XOR) circuit - 2022.1 English

Xilinx Power Estimator User Guide (UG440)

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2022.1 English

XOR logic cones contain more glitches and as the number of logic levels increases, the glitch count keeps increasing. However, it does have a saturation point. In a non-glitch activity, the saturation point will be at 50% toggle rate (at 3 to 4 levels of XOR tree). In XOR logic, toggle rates depend on the circuit topology. Number of glitches depends on the exact depth and width of an XOR tree. Different XOR logic tree depth levels give different results.